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AT89C5130A-RDTUM датащи(PDF) 41 Page - ATMEL Corporation

номер детали AT89C5130A-RDTUM
подробное описание детали  8-bit Flash Microcontroller with Full Speed USB Device
PDF  188 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C5130A-RDTUM датащи(HTML) 41 Page - ATMEL Corporation

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41
4337K–USB–04/08
AT89C5130A/31A-M
Table 9-3.
Software Registers
After programming the part by ISP, the BSB must be cleared (00h) in order to allow the applica-
tion to boot at 0000h.
The content of the Software Security Byte (SSB) is described in Table 9-4
and Table 9-5.
To assure code protection from a parallel access, the HSB must also be at the required level.
The two lock bits provide different levels of protection for the on-chip code and data, when pro-
grammed as shown to Table 9-5.
Address
Mnemonic
Description
Default value
01
SBV
Software Boot Vector
FFh
–
00
BSB
Boot Status Byte
0FFh
–
05
SSB
Software Security Byte
FFh
–
30
–
Copy of the Manufacturer
Code
58h
Atmel
31
–
Copy of the Device ID #1:
Family Code
D7h
C51 X2, Electrically
Erasable
60
–
Copy of the Device ID #2:
Memories
F7h
AT89C5130A/31A-M 32
Kbyte
61
–
Copy of the Device ID #3:
Name
DFh
AT89C5130A/31A-M 32
Kbyte, revision 0
Table 9-4.
Software Security Byte (SSB)
7
6
5
4
3
2
1
0
-
-
-
-
-
-
LB1
LB0
Bit
Number
Bit
Mnemonic
Description
7
-
Reserved
Do not clear this bit.
6
-
Reserved
Do not clear this bit.
5
-
Reserved
Do not clear this bit.
4
-
Reserved
Do not clear this bit.
3
-
Reserved
Do not clear this bit.
2
-
Reserved
Do not clear this bit.
1-0
LB1-0
User Memory Lock Bits
See Table 9-5



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